package com.java.module.system.controller.admin;

import java.awt.image.BufferedImage;
import java.io.IOException;
import java.util.Objects;
import java.util.concurrent.TimeUnit;

import javax.annotation.Resource;
import javax.imageio.ImageIO;
import javax.servlet.http.HttpServletResponse;

import com.java.common.config.ProfilesConfig;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.util.Base64Utils;
import org.springframework.util.FastByteArrayOutputStream;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

import com.google.code.kaptcha.Producer;
import com.java.common.constant.Constants;
import com.java.common.lang.domain.AjaxResult;
import com.java.common.utils.CaptchaKit;
import com.java.common.utils.redis.RedisCache;
import com.java.common.utils.uuid.IdUtils;
import com.java.module.system.util.CaptchaTypeEnum;

/**
 * 验证码操作处理
 * 
 * @author Administrator
 */
@RestController
public class CaptchaController {

    @Resource(name = "captchaProducer")
    private Producer captchaProducer;

    @Resource(name = "captchaProducerMath")
    private Producer captchaProducerMath;

    @Autowired
    private RedisCache redisCache;

    /**
     * 验证码类型
     */
    @Value("${project.captchaType}")
    private String captchaType;

    @Autowired
    private ProfilesConfig profilesConfig;

    /**
     * 生成验证码
     */
    @GetMapping("/captchaImage")
    public AjaxResult getCode(HttpServletResponse response) throws IOException {
        // 新版字符验证码
        if (Objects.equals(captchaType.toUpperCase(), CaptchaTypeEnum.CAPTCHA.name())) {
            return getCaptcha(response);
        }
        // 保存验证码信息
        String uuid = IdUtils.simpleUuid();
        String verifyKey = Constants.CAPTCHA_CODE_KEY + uuid;

        String capStr = null, code = null;
        BufferedImage image = null;

        // 生成验证码
        if (Objects.equals(captchaType.toUpperCase(), CaptchaTypeEnum.MATH.name())) {
            String capText = captchaProducerMath.createText();
            capStr = capText.substring(0, capText.lastIndexOf("@"));
            code = capText.substring(capText.lastIndexOf("@") + 1);
            image = captchaProducerMath.createImage(capStr);
        } else {
            capStr = code = captchaProducer.createText();
            image = captchaProducer.createImage(capStr);
        }

        redisCache.setCacheObject(verifyKey, code, Constants.CAPTCHA_EXPIRATION, TimeUnit.MINUTES);
        // 转换流信息写出
        FastByteArrayOutputStream os = new FastByteArrayOutputStream();
        try {
            ImageIO.write(image, "jpg", os);
        } catch (IOException e) {
            return AjaxResult.error(e.getMessage());
        }

        AjaxResult ajax = AjaxResult.success();
        ajax.put("uuid", uuid);
        ajax.put("img", Base64Utils.encodeToString(os.toByteArray()));
        return ajax;
    }

    /**
     * 新版字符验证码
     * 
     * @author yilabao
     * @date 2021年3月26日
     * @param response
     * @return AjaxResult
     */
    private AjaxResult getCaptcha(HttpServletResponse response) {
        String uuid = IdUtils.simpleUuid();
        String verifyKey = Constants.CAPTCHA_CODE_KEY + uuid;

        String code = CaptchaKit.getRandomString();

        redisCache.setCacheObject(verifyKey, code, Constants.CAPTCHA_EXPIRATION, TimeUnit.MINUTES);

        FastByteArrayOutputStream os = CaptchaKit.createCaptcha(code);

        AjaxResult ajax = AjaxResult.success();
        ajax.put("uuid", uuid);
        ajax.put("img", Base64Utils.encodeToString(os.toByteArray()));

        // 仅开发环境才可将code暴露给前端！！！
        if (profilesConfig.isDevelopment()) {
            ajax.put("uuid_c", code);
        }

        os.close();
        return ajax;
    }

}